Fluid treatment system

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 61/10 (2006.01) B01D 61/08 (2006.01) C02F 1/44 (2006.01)

Patent

CA 2400949

A water treatment system having a reverse osmosis unit (14) includes a storage tank (40) having an outer tank housing (42) that encloses an expandable bladder (50). A pressurized region (62) is defined between the outside of the bladder (50) and inside of the housing (42). A control valve assembly (44) controls communication of source water under pressure to pressurizing region (62) and communicates the region (62) with a drain (22). The assembly (44) includes a pilot valve (70) that is responsive to a state of dispensing and includes a valve element (76) that moves between a first dispensing position and a second non-dispensing position. A servo valve (72) is responsive to position of the pilot valve (70) and communicates source water under pressure to the region (62) when the pilot valve (70) is in the first position thus applying pressure to bladder (50) to expel treated water and communicates region (62) to the drain (22) when dispensing is not occurring so as to allow bladder (50) to expand as it receives treated water from the reverse osmosis unit (14).

L'invention concerne un système de traitement d'eau doté d'une unité d'osmose (14) inverse, comprenant un réservoir de stockage (40) dont le logement de réservoir (42) extérieur renferme une vessie expansible (50). Une région sous pression (62) est définie entre l'extérieur de la vessie (50) et l'intérieur du logement (42). Un ensemble vanne de commande (44) commande la distribution d'eau de source sous pression vers une région de mise sous pression (62) et la communication de ladite région (62) avec un drain (22). L'ensemble (44) comprend une vanne pilote (70) sensible à un état de distribution, et un élément de vanne (76) qui se déplace entre une première position de distribution et une seconde position de non distribution. Une électrovanne (72) est sensible à la position de la vanne pilote (70) et distribue l'eau de source sous pression à la région (62) lorsque ladite vanne pilote (70) se trouve dans la première position, ce qui exerce une pression sur la vessie (50) permettant d'expulser l'eau traitée, et relie la région (62) et le drain (22) lorsqu'il n'y a pas de distribution de sorte que la vessie (50) peut se déployer lorsqu'elle reçoit l'eau traitée de l'unité d'osmose (14) inverse.

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